Solution:
The setting is found here: Base setup->Secondary Trigger Settings->Sectrig minimum angle and Sectrig maximum angle.
I found that the configuration values "strig_max_angle" and "strig_min_angle" was swapped in the configuration that came with the ECU when delivered. It's hard to spot this in VT and only a Diff of a working and a non working configuration file allowed me to find it.
The correct configuration is found in all the default firmware configurations but they don't overwrite settings already available. The defaults must have been bad some time in the past.
Problem: A C004 car that runs well is reporting a "sec trig position bad" trigger error.